Quote:
Originally Posted by Yvonnemarc
I leave my gray water valve open to the septic. The p-traps prevent any stink from coming into the RV. The black tank valve I leave closed and empty when needed.
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If you drop a sag in your sewer hose it creates a P trap to prevent anything coming into the rv also..
And a reminder for those that may not know, NEVER EVER leave the black tank valve open, drain as needed ONLY!